Exit and Disposal and Other Restructuring Activities - Components of Exit and Disposal Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Employee severance and benefit arrangements	$ 3.8	$ 0.5	$ 12.2	$ 6.6
Facility cleanup costs	1.6	0.0	2.4	0.0
Accelerated depreciation	0.0	0.1	2.2	0.1
Relocation costs	0.0	0.1	0.3	0.2
Lease termination cost	0.0	0.5	0.0	1.4
Other restructuring costs	0.1	0.6	1.5	1.8
Total exit and disposal costs	5.5	1.8	18.6	10.1
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	3.7	1.2	9.8	5.7
Selling and administrative expenses
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	1.6	0.6	6.8	4.1
Research and development expenses
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.2	0.0	0.2	0.1
Other operating expense, net
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.0	0.0	1.8	0.2
Carlisle Interconnect Technologies
Restructuring Cost and Reserve [Line Items]
Employee severance and benefit arrangements	1.0
Total exit and disposal costs	4.5	1.3	11.0	6.1
Carlisle Brake & Friction
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.4	0.5	4.6	1.7
Carlisle Fluid Technologies
Restructuring Cost and Reserve [Line Items]
Total exit and disposal costs	0.0	0.0	2.1	2.1
Carlisle Construction Materials
Restructuring Cost and Reserve [Line Items]
Employee severance and benefit arrangements	0.6
Total exit and disposal costs	$ 0.6	$ 0.0	$ 0.9	$ 0.2